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// RUN: %clang_cc1 -std=c++98 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1
// RUN: %clang_cc1 -std=c++11 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
// RUN: %clang_cc1 -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
// RUN: %clang_cc1 -std=c++17 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
// RUN: %clang_cc1 -std=c++2a %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
#if __cplusplus >= 201103L
namespace dr2338 { // dr2338: 12
namespace B {
enum E : bool { Zero, One };
static_assert((int)(E)2 == 1, "");
} // namespace B
namespace D {
enum class E : bool { Zero, One };
static_assert((int)(E)2 == 1, "");
} // namespace D
} // namespace dr2338
#endif
namespace dr2346 { // dr2346: 11
void test() {
const int i2 = 0;
extern void h2b(int x = i2 + 0); // ok, not odr-use
}
}
namespace dr2352 { // dr2352: 10
int **p;
const int *const *const &f1() { return p; }
int *const *const &f2() { return p; }
int **const &f3() { return p; }
const int **const &f4() { return p; } // expected-error {{reference to type 'const int **const' could not bind to an lvalue of type 'int **'}}
const int *const *&f5() { return p; } // expected-error {{binding reference of type 'const int *const *' to value of type 'int **' not permitted due to incompatible qualifiers}}
// FIXME: We permit this as a speculative defect resolution, allowing
// qualification conversions when forming a glvalue conditional expression.
const int * const * const q = 0;
__typeof(&(true ? p : q)) x = &(true ? p : q);
// FIXME: Should we compute the composite pointer type here and produce an
// lvalue of type 'const int *const * const'?
const int * const * r;
void *y = &(true ? p : r); // expected-error {{rvalue of type 'const int *const *'}}
// FIXME: We order these as a speculative defect resolution.
void f(const int * const * const &r);
#if __cplusplus >= 201103L
constexpr
#endif
int *const *const &f(int * const * const &r) { return r; }
// No temporary is created here.
int *const *const &check_f = f(p);
#if __cplusplus >= 201103L
static_assert(&p == &check_f, "");
#endif
}
namespace dr2353 { // dr2353: 9
struct X {
static const int n = 0;
};
// CHECK: FunctionDecl {{.*}} use
int use(X x) {
// CHECK: MemberExpr {{.*}} .n
// CHECK-NOT: non_odr_use
// CHECK: DeclRefExpr {{.*}} 'x'
// CHECK-NOT: non_odr_use
return *&x.n;
}
#pragma clang __debug dump use
// CHECK: FunctionDecl {{.*}} not_use
int not_use(X x) {
// CHECK: MemberExpr {{.*}} .n {{.*}} non_odr_use_constant
// CHECK: DeclRefExpr {{.*}} 'x'
return x.n;
}
#pragma clang __debug dump not_use
// CHECK: FunctionDecl {{.*}} not_use_2
int not_use_2(X *x) {
// CHECK: MemberExpr {{.*}} ->n {{.*}} non_odr_use_constant
// CHECK: DeclRefExpr {{.*}} 'x'
return x->n;
}
#pragma clang __debug dump not_use_2
}
#if __cplusplus >= 201707L
// Otherwise, if the qualified-id std::tuple_size<E> names a complete class
// type **with a member value**, the expression std::tuple_size<E>::value shall
// be a well-formed integral constant expression
namespace dr2386 { // dr2386: 9
struct Bad1 { int a, b; };
struct Bad2 { int a, b; };
} // namespace dr2386
namespace std {
template <typename T> struct tuple_size;
template <> struct std::tuple_size<dr2386::Bad1> {};
template <> struct std::tuple_size<dr2386::Bad2> {
static const int value = 42;
};
} // namespace std
namespace dr2386 {
void no_value() { auto [x, y] = Bad1(); }
void wrong_value() { auto [x, y] = Bad2(); } // expected-error {{decomposes into 42 elements}}
} // namespace dr2386
#endif
namespace dr2387 { // dr2387: 9
#if __cplusplus >= 201402L
template<int> int a = 0;
extern template int a<0>; // ok
template<int> static int b = 0;
extern template int b<0>; // expected-error {{internal linkage}}
template<int> const int c = 0;
extern template const int c<0>; // ok, has external linkage despite 'const'
template<typename T> T d = 0;
extern template int d<int>;
extern template const int d<const int>;
#endif
}
#if __cplusplus >= 201103L
namespace dr2303 { // dr2303: 12
template <typename... T>
struct A;
template <>
struct A<> {};
template <typename T, typename... Ts>
struct A<T, Ts...> : A<Ts...> {};
struct B : A<int, int> {};
struct C : A<int, int>, A<int> {}; // expected-warning {{direct base 'A<int>' is inaccessible}}
struct D : A<int>, A<int, int> {}; // expected-warning {{direct base 'A<int>' is inaccessible}}
struct E : A<int, int> {};
struct F : B, E {};
template <typename... T>
void f(const A<T...> &) {
static_assert(sizeof...(T) == 2, "Should only match A<int,int>");
}
template <typename... T>
void f2(const A<T...> *);
void g() {
f(B{}); // This is no longer ambiguous.
B b;
f2(&b);
f(C{});
f(D{});
f(F{}); // expected-error {{ambiguous conversion from derived class}}
}
} //namespace dr2303
#endif
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